JPH0621443U - Seat structure with leg rest - Google Patents

Abstract

(57) [Abstract] [Purpose] The hinge center of the leg rest does not adversely affect the riding comfort, and there is no gap between the leg rest and the cushion, and the leg rest swing space is reduced. thing. [Structure] A link member 2 pivotally supported by each of a pair of brackets 10, 10 provided at a lower end front portion of a cushion frame, and a base end portion pivotally supported by the link member 2 and a tip end portion of a leg rest plate 4. Connected arm bracket 3
The tip of the leg rest is connected to the leg rest plate 4 and the screw shaft 5 moves back and forth in the axial direction so that the upper end of the leg rest follows the front edge of the cushion and the front portion of the cushion swings as a virtual hinge center. Dynamic mechanism 6
It was equipped with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a seat structure with a leg rest, which is a vehicle seat.

[0002]

[Prior art]

 Various types of conventional seat structures with leg rests have been developed. The first one is disclosed in Japanese Utility Model Laid-Open No. 3-42737, and has a substantially L-shaped legrest support member extending up to near the front upper part of the seat cushion support surface of the seat support member. It is possible to select an arbitrary tilt position between a retracted position in which the base end is rotatably supported by the front end of the leg rest support member and is suspended substantially vertically and a substantially horizontal leg support position. It is configured with a leg rest that is. In this first type, the upper part of the front of the seat cushion is the hinge center of the leg rest.

The second one is disclosed in Japanese Utility Model Publication No. 3-9648, in which the leg rest can be moved up and down with respect to the base arm as the base arm swings, and the lower end of the seat cushion. The front part can be stored behind the front edge of the seat cushion. In the second type, the leg rest is attached to a base arm pivotally attached at one end to the lower end front part of the seat cushion so as to be able to move up and down via a four-bar link.

The third one is disclosed in Japanese Utility Model Publication No. 3-5474, and includes a guide rail fixed to the lower surface of the cushion frame of the seat cushion so as to extend in the front-rear direction and the guide rail. The slide arm is configured to be slidably guided in the front-rear direction, and a leg rest is supported at the tip of the slide arm so as to be rotatable in the front-rear direction via a support shaft. The third one is used by pulling the leg rest away from the front surface of the seat cushion.

[0005]

[Problems to be solved by the device]

 However, these conventional seat structures with leg rests have various problems as described below. In other words, in the first type, the hinge center of the legrest is located in the shallow part of the seat cushion, so when trying to match the height of the front end of the cushion with the height of the legrest when using the legrest, the hinge position is close to the seat surface. Cushioning is impaired and riding comfort deteriorates.

[0006] The second one requires a four-bar link for raising and lowering the leg rest, so that the mechanism is not compact, and if this mechanism is used, a large space is required for storing the leg rest during use. It is difficult to apply it to places that are subject to space restrictions, such as automobile seats.

Further, since the third one is used by separating the leg rest from the cushion, a gap is created between the leg rest and the cushion at the time of use, and the appearance is not good.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent the hinge center from adversely affecting the riding comfort even when the legrest is swung to the same height as the cushion, and (EN) It is possible to provide a compact seat with legrest that can be used without a gap and that requires a small swing space.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention has a leg cushion that can be swung between a supporting position for supporting a seated person's legs and a storage position for maintaining the seated person's normal sitting posture. In a seat structure with leg rests attached to the vehicle, a link member pivotally supported by each of a pair of brackets provided at the lower end front portion of the cushion frame, and a base end portion of the link member is pivotally supported and a tip end portion of the leg member has a leg portion. By moving the arm bracket connected to the rest and the shaft whose tip is connected to the leg rest in the axial direction, the upper end of the leg rest moves along the front peripheral edge of the seat cushion and the front part of the cushion swings as a virtual hinge center. It is characterized by having a swing mechanism for moving.

[0010]

[Action]

 Since the present invention has the above-described configuration, the leg rest swings with the front portion of the seat cushion as a virtual hinge center, and the hinge center is not located near the seat surface.

Further, the swinging of the leg rest is performed by aligning the upper end of the leg rest with the front part of the cushion, and the swinging space is small, and a gap is provided between the leg rest and cushion. It can be done in a state where it does not occur.

[0012]

【Example】

 Hereinafter, the present invention will be described in detail based on illustrated embodiments. FIG. 1 shows a mechanism portion 1 of a seat structure with legrest according to the present invention. The mechanism portion 1 includes a link member 2 pivotally supported by each of a pair of brackets 10, 10 provided at a front lower end portion of a cushion frame (not shown), and a leg pivotally supported by an upper end portion of the link member 2. The arm bracket 3 is connected to the rest plate 4, and the swing mechanism 6 is connected to the leg rest plate 4 and has a screw shaft 5 that moves forward and backward in the axial direction.

The link member 2 has a first link arm 21 whose one end is pivotally supported 21 a on the bracket 10, and a second link arm 22 whose lower end is pivotally supported 22 a on the other end of the first link arm 21. And a third link arm 23b, one end of which is pivotally supported 23a and the other end of which is pivotally supported 23b by the bracket 10 at the center of the second link arm 22. As shown in FIG. 1, the link arms 21, 22, and 23 have the link arms 21 and 22 assembled in a dogleg shape with the pivotal support portion 22a as a bending point when the legrests are stored. And 23 are branched at the pivotal portion 23a and assembled in a Y-shape.

The arm bracket 3 is formed to be bent in an L-shape, and its base end is pivotally supported and attached to the upper end of the second link arm 22 and its tip 3 b is attached to the leg plate 4. It is connected to the upper portion of the leg plate 4 by bolts (not shown) screwed into bolt holes 4a provided on the upper portions of both sides.

Further, the swinging mechanism 6 is attached so that the screw shaft 5 is moved forward and backward in the axial direction by the drive of the motor 7. That is, the screw shaft 5 is axially slidably supported by a frame 9 pivotally supported by a bracket 8 fixed to a cushion frame, and is moved forward and backward by driving a motor 7 attached to the frame 9. It is supposed to do. A T-shaped bracket 11 is pivotally supported at the tip of the screw shaft 5 and is connected to the lower central part of the leg plate 4 via the bracket 11. For this reason, the leg plate 4 is provided with bolt holes 4b, 4b for fixing the bracket 11 in the lower center part thereof. In addition, flanges 12 and 13 for preventing the shaft 5 from coming off are provided at the front end portion and the rear end portion of the screw shaft 5, and the leg rest plate 4 constitutes a leg rest 14 by adding cushion material to the leg rest plate 4. .

The mechanical portion 1 of the seat structure with leg rests configured as described above operates as follows. FIG. 2 shows a stored state of the leg rest 14. In this stored state, the upper portion of the leg rest 14 is in a vertical state in which the upper portion of the leg rest 14 is in contact with the lower edge of the front portion of the cushion 15, and the screw shaft 5 has a flange 12 provided at the tip end thereof in contact with the front surface of the frame body 9. They are in contact with each other and have retreated to the maximum. As shown in FIG. 4, the seat 100 in this stored state is in a state in which the leg rest 14 does not project forward from the front surface portion 101 of the cushion 15 and can be seated in a normal sitting posture.

From this stored state, the motor 7 is driven to move the screw shaft 5 forward, so that the leg rest 14 shown in FIG. 3 can be used. In this state of use, the upper end of the leg rest 14 is in contact with the front end of the cushion 15 and is located at substantially the same height as the front end of the leg rest 14, and the lower end is located slightly lower than the upper end of the leg rest 14 to the front. It is in a substantially horizontal state with a protrusion. At this time, the screw shaft 5 is in a state in which the flange 13 provided at the rear end thereof is in contact with the rear surface of the frame body 9 to the maximum extent, and the link arm 21 of the link member 2 is a centered on the pivot portion 21a. The link arm 22 rotates in the direction b around the pivot portion 22a, and the link arm 23 rotates in the direction c around the pivot portion 23b, so that the whole is obliquely extended forward. It is in a broken state.

Further, the arm bracket 3 is in a substantially vertical state by pivoting in the e direction around the pivotal support portion 3a as the pivotal support portion 3 moves substantially horizontally in the d direction, and the bracket 11 is screwed. As the shaft 5 advances, it pivots in the f direction around the pivot 11a to be in a vertical state substantially parallel to the arm bracket 3, and the frame 9 moves in the direction g around the pivot 9a. The screw shaft 5 is rotated to support the screw shaft 5 slightly upward.

The leg rest 14 can be converted from the stored state to the used state by the movements of the respective constituent elements. At the time of this conversion, the leg rest 14 should swing in the direction B around the virtual hinge center A at the center of the front portion of the cushion 15 with the upper end portion of the leg rest 14 being in contact with the front edge portion 15a of the cushion 15. And the usage status is obtained. As shown in FIG. 5, the seat 100 in this use state has the legrest 14 projecting forward from the front surface portion 101 of the cushion 15, and the occupant is seated in a rest state with the legs resting on the legrest 14. Can take a posture.

Further, in order to convert the leg rest 14 from the used state to the stored state, the screw shaft 5 is retracted by the drive of the motor 7, and the link member 2, the arm bracket 3 and the bracket 11 are moved in the above-described rotation direction. This can be done by rotating in the opposite direction, and the stored state shown in FIG. 4 can be obtained.

[0021]

[Effect of device]

 As described above, according to the present invention, the leg rest is swung about the virtual hinge center on the front portion of the seat cushion, so that when the leg rest is swung to the same height as the cushion. However, the hinge center does not adversely affect the riding comfort.

Further, since the swinging of the leg rest is performed with the upper end portion of the leg rest along the front edge portion of the cushion, the space required for swinging becomes small, and the automobile seat subject to space constraints. In addition to being applicable to the above, it is possible to obtain a use condition in which the appearance is improved without forming a gap between the leg rest and the cushion.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a mechanism portion of the present invention.

FIG. 2 is a schematic side view showing a retracted state of the leg rest of the present invention.

FIG. 3 is a schematic explanatory view showing a usage state of the leg rest of the present invention.

FIG. 4 is an external perspective view of the seat with the legrest stored.

FIG. 5 is an external perspective view of the seat in a state where the leg rest is used.

[Explanation of symbols]

 1 Mechanism part of seat structure with leg rest 2 Link member 3 Arm bracket 4 Leg rest plate (leg rest) 5 Screw shaft (shaft) 6 Swing mechanism 10 Bracket 14 Leg rest 15 Cushion A Virtual hinge center

Claims (1)

[Scope of utility model registration request] 1. A legrest having a legrest attached to a front portion of a seat cushion, the legrest being swingable between a support position for supporting a seated person's legs and a storage position for keeping the seated person's normal sitting posture. In the seat structure, a link member pivotally supported by each of a pair of brackets provided at a lower end front portion of the cushion frame, an arm bracket in which a base end portion is pivotally supported by the link member and a tip end portion is connected to a leg rest, And a swing mechanism for swinging the front end of the leg rest as a virtual hinge center by moving the upper end of the leg rest along the front peripheral edge of the seat cushion by advancing and retracting in the axial direction of a shaft whose tip end is connected to the leg rest. The seat structure with leg rests is characterized by